Update Pepper interface for EME

ppapi/proxy/ppp_content_decryptor_private_proxy.h

Index: ppapi/proxy/ppp_content_decryptor_private_proxy.h
diff --git a/ppapi/proxy/ppp_content_decryptor_private_proxy.h b/ppapi/proxy/ppp_content_decryptor_private_proxy.h
index f7c78baa6db38ae79e44dada2e2f3cc45f5a4c54..fa3416e2f16d4df689c1b6a516be8617f354ca5f 100644
--- a/ppapi/proxy/ppp_content_decryptor_private_proxy.h
+++ b/ppapi/proxy/ppp_content_decryptor_private_proxy.h
@@ -32,6 +32,9 @@ class PPP_ContentDecryptor_Private_Proxy : public InterfaceProxy {
   // Message handlers.
   void OnMsgInitialize(PP_Instance instance,
                        SerializedVarReceiveInput key_system);
+  void OnMsgSetServerCertificate(PP_Instance instance,
+                                 uint32_t promise_id,
+                                 SerializedVarReceiveInput server_certificate);
   void OnMsgCreateSession(PP_Instance instance,
                           uint32_t promise_id,
                           SerializedVarReceiveInput init_data_type,
@@ -44,9 +47,15 @@ class PPP_ContentDecryptor_Private_Proxy : public InterfaceProxy {
                           uint32_t promise_id,
                           SerializedVarReceiveInput web_session_id,
                           SerializedVarReceiveInput response);
-  void OnMsgReleaseSession(PP_Instance instance,
-                           uint32_t promise_id,
-                           SerializedVarReceiveInput web_session_id);
+  void OnMsgGetUsableKeyIds(PP_Instance instance,
+                            uint32_t promise_id,
+                            SerializedVarReceiveInput web_session_id);
+  void OnMsgCloseSession(PP_Instance instance,
+                         uint32_t promise_id,
+                         SerializedVarReceiveInput web_session_id);
+  void OnMsgRemoveSession(PP_Instance instance,
+                          uint32_t promise_id,
+                          SerializedVarReceiveInput web_session_id);
   void OnMsgDecrypt(PP_Instance instance,
                     const PPPDecryptor_Buffer& encrypted_buffer,
                     const std::string& serialized_encrypted_block_info);